Controlling mechanism



March 13, 1928.

E. G. GARTIN l66z'791 CONTROLLING MECHANISM Filed Dec. 26. 19221 6 6 I I I I I I I I I I 6 I 6 t I I 9 I 6 'I i I 4 Patented Mar. .13, 192

UNITED STATES PATENT OFFICE.

ELMER G. GARTIN, or CLAREMONT, NEW HAMPSHIRE, AssieNoR TO SULLIVAN MACHINERY COMPANY, A CORPORATION or MASSACHUSETTS.

CONTROLLING MECHANISM.

Application filed December 26 1922. Serial No. 609,131.

My invention relates to controlling mechanisms, and more particularlyto controll ng mechanisms for controlling the operation of rock drilling devices.

An object of my invention is to provide an. improved controlling mechanism. A more specific object of my invention is to provide an improved controlling mechanism for controlling the position of the control valve of a pneumatic feeding means. Other objects and advantages of my invention Wlll hereinafter more fully appear.

In the accompanying drawings I have shown for purposes of illustration one form which my invention may assume in practice.

In these drawings,

Fig. 1 is a side elevation of the stoping mechanism in which the illustrative form of my invention is employed, parts belng broken away to show details.

Fig. 2 is a view in central longitudinal section, showing details of construction.

In the illustrative form of my invention I have shown the same incorporated in a stoping mechanism which is generally designated l and which comprises a usual dr lling motor 2 which has a cylinder 3 n which a piston 4 reciprocates and percussively actuates a drill steel 5. At the rear end of the cylinder 2 is an intermediate head 6 to which there is attached a feeding mechanism generally designated 7 and comprising a feed cylinder 8 within whose bore 9 a piston 10 is arranged. The piston 10has a plston rod 11 at whose rearward extremity an abutment engaging point 12 is carried. This point 12 is adapted to engage a stationary abutment so that, upon admission of operating fluid to the cylinder bore 9, the cylinder 8 and the niotor 2 will be fed'forward. A handle 13 controlling a valve 14 controls the supply of motive fluid from a line 15 to the motor 2 and to a port 16 which constitutes the fluid supply connection for the feeding mechanism.

Frequent difliculty is found in handling these stoping drills in supporting the drill during starting of the hole, the drilling mechanism being somewhat top-heavy if an effort is made to handle it by the usual manual grasping handle which ordinarily is arranged at a point about opposite the intermediate head 6. In order'to facilitate the handling of the drilling mechanism and to improve its balance, I have arranged a manual grasping handle 20 secured to the cylinder 3 of the motor at a point adjacent the front end thereof so that a much larger percentage of the weight of the drill is below the handle 20. In order to permit the ready control of the feed from this handle, I have also provided improved means for holds the handle 20 to control the supply of air through the port 16. This is accomplished in the illustrative form of my inventlon by mounting a pivoted finger lever 21 to oscillate about a pivot 22 carried by the handle member 20, one end of the lever 21 projecting as at 23 into a hollow chamber 24 in the handle 20. This inner end of the lever member is herein pivotally con nected, as at 25 to a flexible operating member 26 which is possessed of considerable stiffness and yet the requisite flexibilityto permit it to be disposed and'moved as will be described. The member 26 is guided within the handle chamber 24; by a sleeve 27 which is screwed into the front end of the handle and extends byway of a rather snugly fitting passage 28 downward to an enlargement 29 in the cylinder member 3 formed at a point adjacent the intermediate head 6. In this enlargement and also projecting into a bore 30 in the intermediate head is a valve member 31 against whose rear end the member 26 abuts. A collar 32 surrounds the member 30 a short distance from its rear end and a spring 33 tends to normally move the member 31 forwardly, i. e. towards open position. At its opposite end the member 31 is tapered as indicated at 34.- and cooperates with a conical valve seat 35 which is arranged at the junction of the passage 16 and a passage 36 leading into the feed cylinder. It will be obvious that if desired, instead of using the'fiexible member 26 as the power transmitting member,

enabling the hand of the drill runner which I may employone of the forms of flexible shaft which are used, for example, with camera shutters, dictographs and similar devices, the sole change under those circumstances being that the outer sleeve of the flexible shaft will be held stationary, while the push rod in the-center thereof will be actuated by thelever 21 and will engage the valve member 31.

The mode of operation of this mechanism as so far described will be clearly apparent. When it is desired to start the drilling of a hole, the operator holds the handle 20 with one hand While operating the handle 13 with theother. By moving the handle 13, air is admitted to the drilling motor 52 and so to the passage 16 and, the valve 31 .being normally open, passes through port 36 to the cylinder of the feed mechanism and causes upward feed. When the drill steel has been moved up against the Work, the operator, by moving the lever 21 with a finger or his thumb, will cause longitudinal movement of the flexible member 26 and this will in turn act uponthe valve member all and depress the same against" the spring in such manner that the passages 16 and 36 will no longer communicate. As a result, the feed will be retarded and it will be possible by suitable manipulation of the lever 21 to control the feed as desired.

lVhile I have in this application specifically described one form which my invention may assume in practice, it. will be un' derstood that this form of the same is shown for purposes of illustration and that the invention may be modified and embodied in other forms Without departing from its spirit or the scope of the appended claims.

lVhat I claim as new and desire to secure by Letters Patent is:

1. In a drilling mechanism, a drilling motor and feeding means therefor adapted to support and advance said motor during drilling, a handle for manually supporting said drilling mechanism arranged at a point Well above the center of mass thereof, and means including a valve and flexible controlling means for said valve operable from said handle for. controlling said feed.

2. A drilling mechanism comprising a drilling motor having a cylinder, and feeding means for said motor, a drill supporting handle projecting laterally at one side of the motor and secured to said cylinder at one end thereof, said handle having a manual grasping portion at its outer extremity, and controlling means for said feeding means comprising a controlling element carried Within the body of the drill at an end of said cylinder remotefrom said handle, and operating means for said element comprismg an operating element carried by said handle n uxtapos1tion-w1th said grasping portion.

A drilling mechanism comprising a drilling motor, feeding means therefor, a drill supporting handle projecting laterally at one side of the drill and having a grasping portion at its outer extremity, and controlling means for said feeding means comprising a controlling element carried Within the body of the motor at a point remote from said handle, and operating means for said controlling element comprising an operating element carried by saidhandle in juxtaposition with said grasping portion, and transmission means between said elements comprising an element movable along a pluraL ity of angularly disposed lines parallel with the longitudinal axes of said motor and said handle respectively.

In testimony whereof I affix my signature.

ELMER G. GARTIN. 

